In 1886 Heilprin went to Florida for the purpose of investigating the geological structure of the peninsula; in 1888, to Bermuda for a similar purpose. Two years later he set out on a scientific expedition to Mexico, and in pursuit of his investigations he ascended Iztaccihuatl, Orizaba, and Popocatepetl, and ascertained their altitudes by barometric measurements. While on this...Read More